Fix for telnet/ssh server: isatty method was not implemented.

Author: jonathanslenders

prompt_toolkit/contrib/ssh/server.py

@@ -40,6 +40,9 @@ def write(s, data):
                 except BrokenPipeError:
                     pass  # Channel not open for sending.
 
+            def isatty(s) -> bool:
+                return True
+
             def flush(s):
                 pass
 

prompt_toolkit/contrib/telnet/server.py

@@ -88,6 +88,9 @@ def write(self, data: str) -> None:
         self._buffer.append(data.encode(self._encoding, errors=self._errors))
         self.flush()
 
+    def isatty(self) -> bool:
+        return True
+
     def flush(self) -> None:
         try:
             self._connection.send(b"".join(self._buffer))